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Other Intangible Assets and Goodwill (Changes in Carrying Amount of Goodwill By Reportable Operating Segment) (Tables)
$ in Millions
6 Months Ended
Mar. 31, 2019
USD ($)
Goodwill [Line Items]  
Goodwill, beginning balance $ 3,541.6
Other 67.3
Goodwill, ending balance $ 3,603.5
Schedule of Goodwill [Table Text Block]
 
Americas
 
China/Asia Pacific
 
EMEA
 
Channel
Development
 
Corporate and Other
 
Total
Goodwill balance at September 30, 2018
$
497.4

 
$
2,986.6

 
$
11.3

 
$
34.7

 
$
11.6

 
$
3,541.6

Impairment

 

 

 

 
(5.4
)
 
(5.4
)
Other
(0.9
)
 
68.1

 

 

 
0.1

 
67.3

Goodwill balance at March 31, 2019
$
496.5

 
$
3,054.7

 
$
11.3

 
$
34.7

 
$
6.3

 
$
3,603.5

Americas Segment [Member]  
Goodwill [Line Items]  
Goodwill, beginning balance $ 497.4
Other (0.9)
Goodwill, ending balance 496.5
China / Asia Pacific Segment [Member]  
Goodwill [Line Items]  
Goodwill, beginning balance 2,986.6
Other 68.1
Goodwill, ending balance 3,054.7
EMEA Segment [Member]  
Goodwill [Line Items]  
Goodwill, beginning balance 11.3
Other 0.0
Goodwill, ending balance 11.3
Channel Development [Member]  
Goodwill [Line Items]  
Goodwill, beginning balance 34.7
Other 0.0
Goodwill, ending balance 34.7
Corporate and Other [Member]  
Goodwill [Line Items]  
Goodwill, beginning balance 11.6
Other 0.1
Goodwill, ending balance $ 6.3